VILLAGE OF MCARTHUR WWTP
NPDES ID: OH0048241
E — SNC: Effluent violation (monthly average limit)
The facility discharged more of a pollutant than its permit allows, based on a monthly average.
This quarter: 5 effluent violations.
Violations
May 31, 2026
BOD, carbonaceous [5 day, 20 C]
91% over limit
Discharged 89 kg/d against a permitted limit of 46.7 kg/d (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
355% over limit
Discharged 340 kg/d against a permitted limit of 74.8 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
Solids, total suspended
287% over limit
Discharged 650 kg/d against a permitted limit of 168 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
Solids, total suspended
39% over limit
Discharged 170 kg/d against a permitted limit of 122 kg/d (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2026
Nitrogen, ammonia total [as N]
47% over limit
Discharged 7.49 mg/L against a permitted limit of 5.1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2026
Nitrogen, ammonia total [as N]
28% over limit
Discharged 12.2 kg/d against a permitted limit of 9.54 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
55% over limit
Discharged 7.92 mg/L against a permitted limit of 5.1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
February 28, 2026
Nitrogen, ammonia total [as N]
54% over limit
Discharged 14.7 kg/d against a permitted limit of 9.54 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
143% over limit
Discharged 12.4 mg/L against a permitted limit of 5.1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2026
Nitrogen, ammonia total [as N]
151% over limit
Discharged 12.8 mg/L against a permitted limit of 5.1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
55% over limit
Discharged 14.8 kg/d against a permitted limit of 9.54 kg/d (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2025
Nitrogen, ammonia total [as N]
64% over limit
Discharged 15.6 kg/d against a permitted limit of 9.54 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
147% over limit
Discharged 12.6 mg/L against a permitted limit of 5.1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
November 30, 2025
Nitrogen, ammonia total [as N]
29% over limit
Discharged 6.57 mg/L against a permitted limit of 5.1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
October 31, 2025
Nitrogen, ammonia total [as N]
13% over limit
Discharged 2.48 mg/L against a permitted limit of 2.2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
June 30, 2025
Nitrogen, ammonia total [as N]
15% over limit
Discharged 2.52 mg/L against a permitted limit of 2.2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
May 31, 2025
Nitrogen, ammonia total [as N]
58% over limit
Discharged 3.48 mg/L against a permitted limit of 2.2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (24 days ago)